Article (Scientific journals)
Plant polysaccharides initiate underground crosstalk with bacilli by inducing synthesis of the immunogenic lipopeptide surfactin
Debois, Delphine; Fernandez, O.; Franzil, Laurent et al.
2015In Environmental Microbiology Reports, 7 (3), p. 570-582
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Keywords :
Bacilli (class); Bacillus (bacterium); Bacillus sp.; Bacteria (microorganisms)
Abstract :
[en] Some plant-associated bacteria such as Bacillus sp. can protect their host from pathogen ingress and this biocontrol activity correlates with their potential to form multiple antibiotics upon in vitro growth. However, our knowledge on antibiotic production by soil bacilli evolving on roots in natural conditions is still limited. In this work, antibiome imaging first revealed that the lipopeptide surfactin is the main bacterial ingredient produced in planta within the first hours of interaction with root tissues. We further demonstrated that surfactin synthesis is specifically stimulated upon perception of plant cell wall polymers such as xylan or arabinogalactan, leading to fast accumulation of micromolar amounts in the root environment. At such concentrations, the lipopeptide may not only favour the ecological fitness of the producing strain in term of root colonization, but also triggers systemic resistance in the host plant. This surfactin-induced immunity primes the plant to better resist further pathogen ingress, and involves only limited expression of defence-related molecular events and does not provoke seedling growth inhibition. By contrast with the strong response mounted upon perception of pathogens, this strongly attenuated defensive reaction induced by surfactin in plant tissues should help Bacillus to be tolerated as saprophytic partner by its host. © 2015 Society for Applied Microbiology and John Wiley & Sons Ltd.
Disciplines :
Microbiology
Author, co-author :
Debois, Delphine ;  Université de Liège > Département de chimie (sciences) > Laboratoire de spectrométrie de masse (L.S.M.)
Fernandez, O.;  URVVC-EA 4707, Stress, Défenses et Reproduction des Plantes, Université de Champagne-Ardenne, Reims, France
Franzil, Laurent ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Bio-industries
Jourdan, E.;  Wallon Center for Industrial Biology, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium
De Brogniez, Alix ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Biologie cell. et moléc.
Willems, Luc  ;  Université de Liège - ULiège > Chimie et bio-industries > Biologie cell. et moléc.
Clément, C.;  URVVC-EA 4707, Stress, Défenses et Reproduction des Plantes, Université de Champagne-Ardenne, Reims, France
Dorey, S.;  URVVC-EA 4707, Stress, Défenses et Reproduction des Plantes, Université de Champagne-Ardenne, Reims, France
De Pauw, Edwin  ;  Université de Liège > Département de chimie (sciences) > Laboratoire de spectrométrie de masse (L.S.M.)
Ongena, Marc ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Bio-industries
Language :
English
Title :
Plant polysaccharides initiate underground crosstalk with bacilli by inducing synthesis of the immunogenic lipopeptide surfactin
Publication date :
2015
Journal title :
Environmental Microbiology Reports
eISSN :
1758-2229
Publisher :
Wiley-Blackwell
Volume :
7
Issue :
3
Pages :
570-582
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 29 June 2015

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